Paint brush



FIG. 1 is a front view of a paint brush;

FIG. 2 is a rear view of the paint brush;

FIG. 3 is a left side view of the paint brush;

FIG. 4 is a right side view of the paint brush;

FIG. 5 is a top view of the paint brush; and,

FIG. 6 is a bottom view of the paint brush.

The broken lines of FIG. 4 are for purposes of illustration only andform no part of the claimed design.

CLAIM The ornamental design for a paint brush, as shown and described.